To what can i compare our government to?

I have this project that asks me to compare something to the following words: Constitution, Democracy, Limited Government, Checks and Balances, Separation Of Powers, Inalienable Rights, Sovereignty, Legislative, Executive, Judicial, Enumerated Powers, Implied Powers, and Executive order. I was thinking that a professional soccer team would be the best. The Constitution could be the rules that are already there to play the game, and the manager could be the President (legislative along with the istant manager and physical trainers), etc. I think a soccer team would be good but im not sure. What do you think?